Pump



T. NOBLE.

PUMP. APPLICATION FILED JUNE 11, 192i.

Patented Oct. 3, 1922.

Thom as Nobl Q 1 5v Ame Patented (l st. 3, i922.

UNITED STATES THOMAS NOBLE, 01F QUATH-IASKI COVE, BRITISH COLUMBIA,CANADA.

PUMP.

Application filed June 11,

1 0 all whom it may concern Be it known that I, THOMAS NOBLE, a subjectof the King of Great Britain, and a resident of Quathiaski Cove, in theProvince of British Columbia, Canada, have invented certain new anduseful Improvements in Pumps, of which the following is a specification.

The invention relates to improvements in pumps, and the object of theinvention is to provide a means whereby the leverage available foroperating the pump plunger is auto matically increased as the strokeproceeds, enabling the pressure to be increased as the resistancebecomes greater and thus the pump is rendered much more powerful thanordinary pumps and being easy to operate individual effort is reduced tothe minimum, so that it is particularly adaptable and eflioient forrunning board hand tire pumps on automobiles, pumps in power plantswhere expansive gas is pumped or for pumps of an analogous character andpurpose.

This object is attained by the construction illustrated in theaccompanying drawing in which the figure shows the practical applicationof the invention.

The illustration shows a double-acting arrangement; it will beunderstood, of course, that the device may be used equally well with onepump only.

1 indicates a pump cylinder of any ordinary type in which is the usualplunger litted with the pump rod 2. At its outer end the pump ispivotally connected to a station ary bracket 3 by a pin at so that itmay oscillate thereon and the free end of the pump rod 2 is connected toa pin 5 secured to the upper end oi a rocking rod 6 the lower end ofwhich is pivotally connected to a bracket 7 secured to a base 8, whichbase may be, for instance, fastened to the running board of anautomobile, and the pin 5 is slidably mounted in an arcuate slot 9formed in the operating handle or lever 10 at a point intermediate itslength to secure the desired leverage, the lower end of the handle beingpivoted on a suitably secured pivot pin 11.

1921. Serial No. 476,737.

The foregoing description applies with equal force to the constructionon the opposite side of the handle or lever which is simply aduplication of that already de scribed for a double acting pump, andsimilar figures of reference are accordingly used to indicate thesimilar parts. Should a compound pump be desired one cylinder is made ofsmaller diameter than the other, or the position of the slot in thehandle is changed and a pipe line with a non-return valve is connectedfrom the larger cylinder to the smaller and to the outlet from thelatter.

The operation of the pump will be readily understood as it will be seenthat movement of the handle 10 back and forth reciprooates the plungerrod 2, causing the cylinder 1 to oscillate and the pin 5 to travel alongthe slot 9 governed by the rocking rod 6, and thus a steady increase ofleverage as the stroke proceeds with corresponding increase of power isautomatically obtained which would not be possible were the pin not somovable and not so governed.

What I claim as my invention is 1. A pump comprising an oscillatingcylinder, a plunger operable in the cylinder a rod carried by theplunger, a pivotally mounted operating handle provided intermediate itslength with an arcuate slot, a pin fixed to the said rod and disposedfor sliding movement in said slot, and means independent of the leverfor governing the movement of the pin in the slot.

2. A pump comprising an oscillating cylinder, a plunger and a rodtherefor, an operating handle pivotally mounted at its lower endprovided intermediate its length with an arcuate slot, a rocking rodpivotally mounted at its lower end on a suitable pivot, and a pinextending slidably through said slot connecting the ends of the plungerrod and the rocking rod.

Dated at Heriot Bay, B. Q, this 14th day of May, 1921.

THOMAS NOBLE.

